ISO-2598-2 › Iron ores -- Determination of silicon content -- Part 2: Reduced molybdosilicate spectrophotometric method
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The method is based on decomposition of the test portion by fusion with sodium tetraborate and treatment with dilute nitric acid, addition of ammonium molybdate to convert silicate into a molybdatosilicate complex, reduction to molybdenum blue with ascorbic acid, and spectrophotometric measurement of the absorbance of the molybdenum blue complex at a wavelength of approximately 600 nm. Applies to silicon contents between 0,1 % and 5,0 % in natural iron ores, iron ore concentrates and agglomerates, including sinter products, especially for ores containing fluorine.
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Document Number
ISO 2598-2:1992
Revision Level
1ST EDITION
Status
Current
Publication Date
Dec. 15, 1992
Committee Number
ISO TC 102/SC 2